Double switch-blade



H. KHANTZ.

DOUBLE SWITCH BLADE.

APPLICATION FILED JUNE [6, 1911.

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DWUBLE s ire e -nn t en,

ipceiflcetlon oi lietters etcnt.

etented Dec... d it.

nrlglnel ennl'lcetion filed March it, ltlli terial No. 27,298. Divided end this epplicetion one tune it,

191?. heriel No. Width.

To all whom it may concern:

Be it known that l, Hunnnr KRANTZ residin at Brooklyn in the county oi Kings end tete oi New fork, have invented certein new end useiul Improvements in e ouhle Switch-hide, oi which the iollowin is e specification. V

his invention relates to e douhle switch hlede such es is shown end descrihed in my ending epplicetion Seriel No. 27,298 filed l erch 111., 1915, oi which this is e division.

The object oi this invention is to provide en improved switch hlede end cerrier thereior.

it iurther ohject is to provide en improved end eflicient' switch hlede ior use in controlling two independent circuits that is, one which is edepted ior swinging first hetween two given .gcontects ior closing e circuit iroin one oi seid contecm to the other, end then swinging irom this osition to hreelr seid circuit end iurther to close e circuit hetween two other given contects.

AL iurther ohject is to provide e switch hlede es ehove which is oi e denihle cherecter end edepted, hp its flerihility to melee en ecient clectricel connection with ell oi seid contects.

Uther ohjects end eirns oi the invention, more or less specific then those reierred to ehovc, will he in pert ohvious end in pert pointed out in the course oi the iollowin description oi the elements conihinetions errengeneents oi perts end epplicetions oi principles constituting the invention; end the scope oi protection contempleted will'he indiceted in the eppended cleirns.

in the eccoinpenving' drewings, which ere.

to he telren es e pert oi this specificetion, end in which ll heve shown merely it proierred iorni oi emhodient oi the invention:

Figure 1 is e longitndinel sectionel view through e switch hlede constructed in eccordence with the provisions oi this invention end showing the seine supported in e suitehle cerrier, the section heing telten suhstentially upon the plene of line i oi Fig. 2.

Fig. 2 is e top plen view oi the structure shown in Fig. 1, end

Fig. 3 is e diagrammatic view illustrating e modificetion.

Reierring to the drewin ior descrihin in detail the structure which is illustrate therein, the reiere'nce character L indicates the carrier which isshown to comprise e peir oi clenip pletes 1 held together by rivets or holts 2 end reteining the'switch hlede Gr hetween them. The. carrier lid is provided with e pivotel extension ll-ll hy incens oi which it iney he pivotelly supported to swing the switch hlede ends into d ll end out oi contec'ting reletion with the pair oi stetionerv contects 3 end i or into end out oi contecting relation with the peir oi stetioner contects 5 end 8..

The etes 1 oi the cerrier engege the switch lede inteiinediete its ends so thet the opposite end portions oi the switch hlede end 6., es will he reedily understoodrir en'inspection oi the drewings.

The switch hlede illustreted is comprised oi two sections es 7 end 8 held epert by e specer ti errenged hetween them end hetween the pletes l oi the cerrier. The sections 7 end 2., end the specer ii-ere ell oi conductive nieteriel end ere held in tight contect with eech other hy meens oi rivets 10 so es to comprise whet inev he reierred to es e mein or hody pert end end contect perts projecting in speced reletion iroin the opposite ends oi the hody pert. 'lhese perts mev he insuleted irorn the cerrier in any suitehle menner hut ere preierehl v insuleted h v e peir oi insuleting letes vl1 errenged hetween the hlede en the clemp pletes l end hy e dpeir oi insuletin sleeves 12 which surroun the rivets 2. l insuleting pletes 13 they he provided ior closing the joint hetween the sleeves 12 end the insuleting pletes 11in emenner which hes heen iully descrihed and claimed in my copending epplicetion heriel No. 175,192, filed on even dete herewith.

The sections 7 end 8 are suhstentiellv identical in ell respects end eech comprises e plurality oi reletively thin strips 1 10i conductive meteriel, such es sheet motel, e pair of relatively hcevy reiniorcing' strips ltlll lllt) and 16 of like material arranged one contact 4. The

- flexible and are a two sections of the outside of and one inside of the strips 14, and 'a third relatively heavy strip 17 of like material arranged inside of the strip 16. he various strips 14 are each slightly longer from the outermost to the innermost strip and. they are arranged. so as to pro- .vide relatively beveled contact surface ortions 18 at the opposite ends of the blade. The strip 15 is somewhat shorter than the outermost strip 14. and is intended to prevent accidental bending or distortion of strips 14 at any time either while handlin or while in use. The strip 16 lies at all times flat against the innermost strip 14 and also serves to prevent accidental bending or distortion of the strips 14. It also serves tostiifen the resilient action of the strips 14 in use. The strip 17 is somewhat longer than any of the other strips and is provided with spark-heads 19 at its opposite ends beyond the toe of the beveled surfaces 18. These heads 19 normally lie in a plane beyond the beveled surfaces 18 so as to be first to engage, and last to leave, the stationary contacts during the use of the blades, as will be readily understood.

The beveled surfaces 18 of the two sections 7 and 8 converge toward each other and, when the switch blade is in the position of Fig. 1 the surface 18 at one end of one section engages the contact 3 while the surface 18 of the other section engages the presence of the spacer 9 and the rivets 10' enable the current to pass freely from one section into the other for completing the circuit between the contacts 3 and 4.

Of course when the switch blade is in its opposite position, engaging the contacts 5 and 6, the two remaining bevel surfaces 18 of the sections will engage said contacts 5 and 6 and the current will pass in like manner.

All of the stri s .14, 15, 16 and 17 are d apted, when brought into engagement with the stationary'contacts, to bend or flex. Inaccuracies of adjustment of the contacts, etc., are thus compensated for and a certain rubbing action against the contacts is provided so that a highly efficient electrical engagement results.

While the adjacent end. portions of the blade are preferably intended to be independent from each other in their engagement with their respective contacts, nevertheless, in some instances, the two adjacent ends may coioperate if de-- sired as shown in Fig. 1. Thus when the spark-head 19 of one blade is pressed back byengagement with itsstationary contact it may be pressed sufficiently far to in turn press against the adjacent spark-head of the other section. The resilient resistance offered by the other section will impart an the added force to the first s ark-head pressing it more firmly against 1ts stationary contact. The likelihood of the end of the first section being bent back too far is also avoided.

In the modification Fi end portions of the sections 7 and 8, are bent laterally awa from each other so as to render said end: more completely independent in their actions. The bent end portions are spaced apart to provide air-spaces 20 between them and for improving the flexibility of the blade as has been fully set forth and claimed in my copending appli cation above referred to.

As many changes could be made in this construction without departing from the scope of the invention as defined in the following claims, it is intended that all matter contained in the above description or shown in the accompanying drawings,shall be' interpreted as illustrative only and not in a limiting sense.

-Having thus described my invention what I claim as new and desire to secure by Let ters Patent is:

1. A switch blade comprising a body part, and a pair of contact parts having relatively movable laminations projecting from one side of the body part in the same eneral direction, the body art comprising means whereby the switch blade may be supported to swing the end portions of said contact parts from one stationary contact to another, and the end portions of said laminated contact parts each having a beveled endsurface for engaging its respective stationary contact.

2. A switch'blade comprising a body part, and a pair of contact parts rojecting rom one side of the body part in t e same general direction, the body part comprising means whereby the switch blade may be supported to swing the end portions of said contact parts from one stationary contact to another, and said contact arts each comprising a spark head and iibxible means resiliently supporting the spark-head in proper cooperative relation with the end portions of the respective contact parts. a

3. A switch blade comprising a body art, and a pair of contact parts rojecting iiom one side of the bodv part in t e same general direction, the bod part comprising means whereby the switcli blade may be supported to swing the end portions of said contact parts from one stationary contact to another, and-each of said contact arts comprising a plurality of strips of resiF' g. 3, the opposite.

lent material having their end edges arranged collectively to provide oppositely inclined beveled contact surfaces for said contact parts.

4. A switch blade comprising a body art, and a pair of contact parts rojecting From one side of the body part int a same general direction, the body part comprising means whereby the switch blade may be supported to swing the end portions of said contact parts from one tationary contact to another, and each of said contact parts comprising a pluralipy of strips of resilient mater al having their end edges arranged collectively to provide beveled contact surfaces for said contact parts, and the beveled contact surfaces of the two contact parts being arranged in outwardly converging relation to each other for the purpose described.

5. A switch blade comprising a, body part, and a pair of contact parts rojecting from one side of the body part in t e same general direction, the body part comprising means whereby the switch blade may be supported to swing the end .portions of said contact parts from one stationary contact to another, and each of said contact arts comprising a lurality, of strips of res' ient material havmg their end edges arranged collectively to provide beveled contact surfaces for said con tact parts, a pair of spark-heads one for each of said contact parts, anda pair of flexible members supporting said spark-heads in operative position beyond the toes of the bevels of the respective contact parts.

6. A switch blade comprising a body part, and a air of contact parts projecting from one si e of the body part in the same general direction, comprising means whereby the switch blade may be supported to swing the end portions of said contact parts from one stationary contact to another, and each of said contact arts comprising a plurality of strips of resllient material having their end edges arranged collectively to provide beveled contact surfaces for said contact parts, and the beveled contact surfaces of the two contact parts being arranged in outwardly converging relation to each other for the purpose described, and a s ark-head resiliently supported substantial y at the apex of the angle formed b said bevels.

7 A double ended switc blade com rising two sections of resilient materia a spacer between said sections intermediate their length retaining the intermediate portions of the sections spaced apart and leaving the end portions of the sections normall spaced apart but free to flex toward each other, the opposite ends of each section being oppositely beveled so that the bevels of adjacent ends converge outwardly toward each other, and spark-heads resiliently supported substantially at the apexes of t e angles formed by said bevels.

8. A double ended switch blade comprising two sections spaced apart a spacer interposed between the interme iate portions of said sections to retain the intermediate portions spaced apart, each of said sections comprising a pluralit of strips of resilient material projecting eyond the spacer to provide flexible contact portions s aced apart at each side of the spacer, an the strips of each section being of varied lengths and being arranged to provide relatively beveled contact surfaces at the ends of each section, said bevels being disposed oppositely to converge toward each other at the respective ends of the blade.

'9. A switch blade comprising a body portion by means of which the blade may be mounted, and a pair of spaced contact per tions having relatively movable laminations projecting from the body portion in the same general direction, the laminations of each contact portion so terminating as to form contact surfaces diverging from the tips of the contact portions toward the body portion.

10. A switch blade comprisin a body part by means of which the blae may be mounted, a air of laminated contact parts having beve ed edges and projecting from the body part in the same general direction, spacinlgl means between said parts, and a spark ead resiliently supported beyond the outer end of one of said contact parts.

11. A switch blade comprising, abody part by means of which the bla e may be mounted, a air of laminated contact parts having beve ed edges and projecting from the body part in the same general direction, spacing means between saidair of parts, and a spark head supports beyond the outer ends of said two contact parts and in a plane therebetween.

12. A switch blade comprising a body part and two pairs of laminated contact extensions projecting from the bod part, the body part comprising a spacer or spacing the two contact extensions of each pair from each other, and said body part and extensions being all of conductive material and in current conve ing contact with each other, whereby -w en either of the exten sions of one of said pairs is engaged wit a suitable circuit contact circuit will be closed through said extension and thron h the 'body to either of the extensions of t e other pair which may also be in engagement with another appropriate circuit contact.

In testimony whereof I afiix my signature in the presence of two witnesses.

HUBERT KRANTZ. Witnesses:

- J. L. Kotm,

S. L. Wnrmoon.

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